Mold for manufacturing rubber footwear.



No. 842,859. LPYATENTED FEB. 5, 1907. M. c. CLARK.

MOLD FOR MANUFACTURING RUBBER FOOTWEAR.

. APPLICATION FILED JUNE 8. 190 6. I

8 SHEETS-SHEET l.

- I W/T/VESSES. T 1 M/VENTOR my NORRIS -Ercks cm, WASHINCYON, u. c.

No. 842,859.. IATENTEDFEB. 5, 1907.

M. 0, CLARK. MOLD FOR MANUFACTURING RUBBER FOOTWEAR.

IIII IIIIIIIIIIIIIIII II 06.

if g

ill F V V E A/V \mm1% no. 842,859. PATENTED FEB. 5, 1907. M. c. CLARK.MOLD FOR MANUFAGTURING RUBBER FOOTWEAR.

API'LIOATIOH FILED JUNE 8, 1906.

' 8 SHEETS-SHEET 8.

TOR

wuss/29:7 wk I j ATTORNEYS rue ucmus nrzns'co wunmorou. b. c

MAURICE O. CLARK, OF PROVIDE NOE, RHODE ISLAND.

MOLDFOR MANUFACTURING RUBBER FOOTWEAR.

Specification of Letters Patent.

Patented Feb. 5, 1907.

Application filed June 8,1906. Serial No. 320,698.

To (Mitch/0m it may concern:

Be it known that I, MAURICE O. CLARK, a citizen of the United States,and a resident of Providence, in the county of Providence and State ofRhode Island, have invented a new and useful Improvement in Molds forManufacturing Rubber Footwear, of which the following is aspecification.

This invention relates to certain novel and useful improvements inmanufacture of rubber footwear, and has particular application toimprovements in the construction and arrangement of the vulcanizing-moldparts.

In the ordinary process of manufacturing molded rubber footwear afour-part mold is usually employed, the side molds or parts beingdivided on the center line of the bead of shoe from heel to toe, andwhere the side parts come together over the vamp there is usually formedupon the shoe a seam, rib, or fin of rubber which extends from theopening at the top of the shoe down across the instep and to the end ofthe toe where the upper joins the toe. This is to some extentdisadvantageous from a commercial standpoint, as it mars the a pearanceof the shoe, and also for the furt er reason that where these side moldsjoin on the center line they are liable to pinch or crimp the lining ofthe shoe in between the two parts, and when this occurs the article isdamaged in most instances to such an extent as to render it unfit forsale.

To overcome the objections above recited and to mold a shoe which, inaddition to being free from crimps in the lining, will present a neatappearance, and to accomplish this purpose, I form my mold ashereinafter described.

The invention consists in the construction, combination, and arrangementof parts set forth in and falling within the scope of the appendedclaims.

In the accompanying drawings, wherein like characters of referenceindicate like parts in all the views, Figure 1 is a top plan view of mymold, which is formed in five parts, such view lacking the last or innerpart and the without sole part. Fig. 2 is a view in side elevation ofthe mold complete, with the last in position, as shown in dotted lines.Fig. 3 is a transverse vertical sectional view taken through thefive-part mold across the heel portion thereof. Fig. 4 is a similar viewtaken across the instep or sole portion of the shoe. Fig. 5 is avertical longitudinal sectional view taken through my five-part mold andthrough the last. Fig. 6 is a cross-section showing the two side moldspartially open and provided with their steam-chambers, the stationaryvamp part, and the sole-mold with its supporting steamchamber; and Fig.7 is a plan view of the stationary or vamp parts and the two side partspartially open.

In describing my invention in detail I will refer particularly to Figs.1, 2, 5, and 7, as these views show clearly the construction andarrangement of parts.

Referring now to the accompanying drawings in detail, 5 designates alast post or stem carrying the last or shoe-forming member 6, thepreferred position being as shown-in Fig. 5, with the sole portion ofthe last uppermost.

,Directly beneath the instep portion of the last is the stationary orinstep part of the mold (indicated at 7) and comprises themolding-surface 8 in such shape as to receive the forward or vamp partof the shoe, said stationary moldpart having a steam-chamber 9, heatedby steam or other suitable agent through pipes 10. This instep orstationary mold part is suitably secured to the bed of the machine andterminates along the lines 11 11, shown in Figs. 1 and 7that is to say,such stationary mold portion receives the instep portion of the shoeand. a part of the opening therein. The side molds are shown at 12 12,each having a heating'chamber 13, so that molds are suitably heated bysteam or other agent. These side molds are of the construction clearlyshown in Figs. 1 and 7 that is to say, the forward parts 14 14 of suchmolds extend approximately parallel with the side of the instep or vampmold part, and each of said extensions is provided with a pin 15,designed to enter the socket 16, formed in the stationary mold part. Theparts14 extend back to the main parts 16 of the side mold, which allcarry the steam or heating chambers, and are beveled at their frontends, as at 17, to conform to the inclined rear edges 11 of thestationary or instep part of the mold. The side molds extend around theheel of the shoe and are con-v structed to meet at approximately thecenter of the back of the heel at the point 17, and one of said sidemold parts at its rear is provided with a pin 18, designed to enter thesocket 19, formed in the opposite side mold part. The top or sole moldis indicated at 20 and is suitably formed to mold the sole upon theshoe, which shoe in the drawings is indicated at S. This top mold 20 isalso formed shoe, side mold members for receivingthat with aheating-chamber 21 for the purpose of employing the vulcanizing heat forthe mold.

From the above description, taken in connection With the accompanyingdrawings, the construction, operation, and arrangement of my improvedmold will be readily understood. The last, with the shoe made upthereon, is placed in the machine, such last comprising one part of theentire mold. The second part of the mold is the stationary or instepmold part, the construction of which has been heretofore described. Thethird and fourth parts of the mold are the side mold parts, Which, asbefore stated, extend from the side of the shoe at a point to the rearof the instep back around the heel of the shoe, while the sole-moldforms the fifth part.

By employing a mold of this character the beads or ribs caused by thejoining of the mold parts instead of appearing at the front or acrossthe instep portion of the shoe will be at the line of junction of theinstep-mold and the side mold and at the heel of the shoe.

A shoe molded in this manner presents somewhat the appearance of ablucher shoe, and the ribs or heads along the front of the instep areavoided.

It will of course be understood that any means may be employed forheating the molds or for oining the same.

The character of the mold parts themselves may be of any desired nature,as one of the principal features of the invention is to avoid the seamor Web directly along the front or instep part of the shoe.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is

1. A mold comprising a front member adapted to act as a mold for aportion of the instep, two side members, a sole-mold and a last forsupporting the shoe to be molded.

2. The combination with a last for supporting the shoe to be molded, ofa mold member for receiving the front portioniofgthe portion of the shoebetween the front mold members and the heel, and a mold member for thesole.

3. A mold for rubber footwear comprising a last for supporting a shoe tobe molded, and a plurality of mold members designed to receive the shoeand the last in such manner that the line of division of certain of themold members will be at the sides of the opening in the shoe and at theheel.

4. A mold for rubber footwear comprising a last member for supportingthe shoe to be molded, a front mold member and two side mold members,the line of division of such front and side mold members being at thesides of the last and at the rear or heel portion thereof, and asole-mold member.

5. A mold for rubber shoes including a front mold member and two sidemold members adapted to be closed about the shoe to be molded, the lineof division, between the front member and the two side members being atthe side of the shoe to be molded.

6. A mold for rubber shoes, comprising a last for supporting the shoe tobe molded, a

stationary iront mold member for the instepportion of the shoe, two sidemold members movable toward and from the last and the stationary member,and a sole-mold member.

7. A mold for making rubber footwear comprising a front mold memberhaving bev eled end portions, movable side mold members adapted to bemoved toward and from the shoe to be molded, the line of divisionbetween the front member and the side member being at the side of theshoe, a mold member for the sole, said front member, the side mem bersand the sole-mold having heating-chambers therein.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

MAURICE C. CLARK.

itnesses R. B. OAVANAGH, Jos. J. PIERANDO.

